Variable exhaust for locomotives



(No Model.)

G. B. TAYLOR.

VARIABLE EXHAUST POR LOOOMOTIVES.

Patented May 23, 1893.

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Tn: wenn UNITED STATES PATENT OFFICE.

GEORGE B. TAYLOR, OF NEW BRUNSWICK, NEW JERSEY.

VARIABLE. EXHAUST FOR LOCOMOTIVES.

SPECIFICATION forming part of Letters Patent N0. 497,970, dated May 23, 1893. Application iiled July 30,189`0. Renewed October 31, 1892. Serial No. 450.451. (No model.)

To all whom it may concern:

Be it known that I, GEORGE B. TAYLOR, a citizen of the United States, residing at New Brunswiclgin the county of Middlesex and State of New Jersey, have invented a certain new and useful Improvement in Variable Exhausts for Locomotives, of which the following is a specification.

The object I have in view is to produce means for Varying the size of the exhaust nozzle of a locomotive, capable of being operated from the cab of the locomotive, which will be simple in construction and effective in operation. A practical and eiiicient variable exhaust for locomotives will permit of the adjustment of the exhaust to the conditions of operation of the locomotive, and the result will be a saving in fuel as well as a more uniformly satisfactory operation of the locomotive. It the locomotive is not making steam with sufficient rapidity, the exhaust can be decreased in size to the desired extent which will sharpen the discharge into the stack and increase the draft. For this reason larger exhaust nozzles may be employed than it is practicable to use with nozzles having [ixed conditions, and when the locomotive is steaming freely the nozzle can be enlarged to its full size, relieving the engine of some back pressure and resulting in the saving of fuel. The power to choke the nozzle and sharpen the exhaust when the locomotive is steaming poorly would make it possible for the engineer to get uniformly satisfactory results and losses of time in running due to insufticient steam pressure would be avoided.

In the accompanying drawings forming a part hereof-Figure l, is a plan View of a double exhaust nozzle with devices embodying my invention applied thereto, the cap plate to the guide box at the right of the nozzle being removed. Fig. 2, is a vertical central section of the same through the partition dividing the nozzle, the sliding choking plate and operating bar being in elevation. Fig. 3 is a vertical section at right angles to Fig. 2. Fig. 4, is a perspective view of the sliding choking plate. Fig. 5, is a top view ot` a single nozzle having the invention applied thereto, the cap plate of the guide box for the sliding choking plate being removed, and Fig. 6,

is a vertical section of the single nozzle, the exhaust pipe being also shown.

The double nozzle A shown in Figs. 1, 2 and 3, has two rectangular exhaust ports formed by the walls of the nozzle and by the central pratition a, which forms a continuation of the central partition of the exhaust pipe upon which the nozzle is mounted as will be well understood, this being one of the usual forms of exhaust nozzles for locomotives.

To make the exhaust one capable of being Y varied from the locomotive cab,I remove the end of the central partition a so that it does not extend through to the end ot the nozzle and mount upon it a sliding choking plate B having a V-shaped lower edge which rests in a similarly shaped groove in the top edge of the partition. Thischoking plate slidesin and out of a guide box b formed in a wing cast on the nozzle. From the end of the choking plate, a

guide plate C extends into a guide box c like the box b but located on the opposite side of the nozzle. The guide plate like thechoking plate works in a groove in the top of the partition; it is of the same width as the partition ct of the nozzle, While the choking plate is wider than such partition and proj ects laterally into the ports when it is pushed out of the guide box b. When the choking plate is withdrawn Wholly into the box b, the exhaust ports are of full size since the guide plate C,

then forms only an extension of the partition a without occupying any of the space of the exhaust ports. As the choking plate is moved out of its box it closes the ports more or less according to the extent of its movement, both ports being choked or decreased in size simultaneously and to the same extent. I have found that Witha double nozzle having ports two and one-halt by three and one-halt inches in size, a choking plate projecting beyond the partition one half inch on each side, will give the maximum variation required, although of course my invention is not limited to a plate of that width, since it might be found desirable to use choking plates of greater or less width. The guide plate C has straight sides forming a continuation of the sides of the partition. The sides of the choking plate are however inclined as shown at d and they also are preferably, vertical for IOO "through'the end of the'box b.

a short distance at their upper edges as shown at e. The object of this configurationv is to limit as far as possible the tendency of the issuing exhaust steam to lift the choking plate from its seat, and also (by means of the vertical portions e) to give the steam the same direction of discharge on the inner edges of the ports as on the other edges whether the ports are choked or not. The boxes b. and c are closed by cap plates as shown, secured by screws or bolts and they also preferably have solid end Walls f. The seats of the choking and guide plates in these boxes and in the edge of the partition are planed to give an accurate fit, enlarged spaces g being left in the boxes in casting to permit this to be done. The operating bar D is pivotally secured to the choking plate .B and connects with a centrally pivoted lever E which projects through the side of the smoke box of the locomotive and is connected with a rod F extending back to the cab.

To apply the invention to a si-ngle round nozzle A (Figs. 5 and 6) the choking plate B. projects into the nozzle from a long guide box h formedin a Wing eastern one side of the nozzle'.v No guide plate extending into a box on the Withdrawal of the choking plate is designed in the ease of the single nozzle aswell as in theA case of the double nozzle to leave the nozzle Without obstruction to the discharge of the exhaust steam. A thin plate extending into a box onthe other side of the nozzle the same as in Fig. l might be employedwithout departing from the spirit of my invention.V The operating barV D is shown in Fig. 5I as passing The choking plate D is also made of V-shape with the point of theV presented to the issuing steam nozzle, of a sliding choking plate, having a,

Width less than that of the nozzle and adapted to be moved adjustably across the opening of the nozzle, substantially as set forth.

2. As a variable exhaust forV locomotives, the combination with a locomotive exhaust nozzle, of a sliding choking plate, having a Width less than that of the nozzle and adapted to be moved adjustably across the open- ;haust nozzle, of a sliding choking Vjecting from a guidebox on one side of the yyond the sides of the yof the same Width as the partition formingan ing of the nozzle, and a guide-box on one side of thev nozzle into which the choking plate is Withdrawn, substantially as set forth.

3. The combination with a locomotive exhaust nozzle, of a sliding choking plate having a Width less than that of the nozzle projecting centrally into and erosswise the nozzle, substantially as set forth.

4. The combination with a locomotive exhaust nozzle, of a sliding choking plate having a Width less than that of the nozzle and lprojecting laterally across the nozzle, said choking plate presenting inclined sides to the '.fissuing steam, substantially as set forth.

The combination With a locomotive explate pronozzle and a guide plate extending from the choking plate into a guide box on the other side ofv the nozzle, substantially as set forth.

6. The combination with a double locomo- Qtive exhaust nozzle, of a choking plate sliding adj ustably across the nozzle on. top of the partition separating the ports of the nozzle, 2said choking. plate being of less width than the nozzle but of greater width than said par- ,tition substantially as set forth. other side of the nozzle is employed since the 7. The combination with a double locomotive exhaust nozzle, of a choking plate slid- `ing adjustably across the nozzle on top of the partitionv separating the ports of the nozzle,

said choking plate being of less Width than -thenozzle but of greater Width than said parltition, a box on one side of theA nozzle from- Which said choking plate projects and into Which it is Withdrawn, and a guide plate of `the samev widthY aswthe partition Y Vextendin from the forward end of saidv choking plate into a box on the other side of the nozzle, sub- ,stan-tially as set forth. and its sides at the upper edge are also pref- 8. The combination withl adouble locomotive exhaust nozzle, ofv a sliding choking plate Working in agroove in the top of the partition ofthenozzle, and projecting laterally bepartition, a guide plate4 extension of the choking plate and Working `in the groove in thetop of the partition, and guide boxes on opposite .18th day of July, 1890.

GEORGE B. TAYLOR; Witnesses:y

J AMES I-IoUGHToN, A. B. TAPPEN. 

